Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
Portuguese
⇄
Afrikaans
Arabic
Basque
Catalan
Chinese
Danish
Dutch
English
Estonian
Finnish
French
German
Greek
Hungarian
Icelandic
Italian
Korean
Lithuanian
Persian
Polish
Russian
Serbian
Slovene
Spanish
Swedish
Turkish
Ukrainian
+
G
o
o
g
l
e
|
Forvo
|
+
amostra estratificada
This HTML5 player is not supported by your browser
math.
分层样本
Add
|
Report an error
|
Get short URL
